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|Section2= |Section3= |Section8= }} Hexamethyldisiloxane (HMDSO) is an organosilicon compound with the formula O()2. This volatile colourless liquid is used as a solvent and as a reagent in organic synthesis. It is prepared by the hydrolysis of trimethylsilyl chloride. The molecule is the protypical disiloxane and resembles a subunit of polydimethylsiloxane. ==Synthesis and reactions== Hexamethyldisiloxane can be produced by hydrolysis of trimethylsilyl chloride: :2 Me3SiCl + H2O → 2 HCl + O()2 It also results from the hydrolysis of silylethers and other silyl-protected functional groups. HMDSO can be converted back to the chloride by reaction with Me2SiCl2.〔Röshe, L.; John, P.; Reitmeier, R. “Organic Silicon Compounds” ''Ullmann’s Encyclopedia of Industrial Chemistry''. John Wiley and Sons: San Francisco, 2003. .〕 Hexamethyldisiloxane is mainly used as source of the trimethylsilyl functional group (-Si(CH3)3) in organic synthesis. For example, in the presence of acid catalyst, it converts alcohols and carboxylic acids into the silyl ethers and silyl esters, respectively.〔Pfeifer, J. "Hexamethyldisiloxane" in ''Encyclopedia of Reagents for Organic Synthesis'' (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. .〕 It reacts with rhenium(VII) oxide to give the silanoate complex:〔Schmidt, M.; Schmidbaur, H., "Trimethylsilyl perrhenate", Inorg. Synth. 1967, 9, 149-151. 〕 :Re2O7 + O()2 → 2 O3ReOSi(CH3)3 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hexamethyldisiloxane」の詳細全文を読む スポンサード リンク
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